The invention discloses a preparation method of safe and healthy stewed mutton with good mouthfeel and taste, wherein the preparation method comprises the following steps: washing fresh mutton cleanly, freezing, thawing and then cutting into blocks, sending the mutton blocks into clear water, soaking, fishing out, and draining, to obtain a first prefabricated material; mixing lemon, cassia bark, nutmeg, cumin, radix angelicae, raw ginger and bay leaf, then wrapping the mixture with gauze, adding clear water, mixing and boiling, then cooking for 10-20 min with slow fire, adding brown sugar, soy sauce, table salt, yellow wine, chicken essence, dried chilli pepper, vanillin, a monascus red pigment and sodium nitrite, cooking, cooling, adding the first prefabricated material, carrying out heat preservation, fishing out, and draining, to obtain a second prefabricated material; sending the second prefabricated material into a baking room, baking, adding brown sugar, soy sauce, table salt, yellow wine, chicken essence, raw ginger, coriander, ethyl maltol, a monascus red pigment and water, cooking, fishing out, and draining, to obtain a third prefabricated material; and freezing to -1 to -5 DEG C, adding gelatin and water, mixing evenly, carrying out intestinal membrane vacuum filling, packaging, sterilizing at high temperature, and thus obtaining the safe and healthy stewed mutton with good mouthfeel and taste.